<div class="wrapper">
    <div id="buttons">
        <button onclick="openChartToolPanel(undefined)">Open Chart Tool Panel</button>
        <button onclick="openChartToolPanel('format')">Open Chart Tool Panel Customize tab</button>
        <button onclick="closeChartToolPanel()">Close Chart Tool Panel</button>
    </div>
    <div id="contents">
        <div id="myGrid"></div>
        <div id="myChart" class="my-chart"></div>
    </div>
</div>
